Contact: Sarah Yang
University of California - Berkeley
Caption: As muscle tissue ages, it loses its ability to adequately repair itself from damage. Instead of creating healthy, new cells to replace damaged ones, the old muscle tissue is left with fibroblasts and scar tissue, as shown here.
Credit: Photo courtesy of Morgan Carlson and Irina Conboy, UC Berkeley
Usage Restrictions: Must include credit to Morgan Carlson and Irina Conboy, UC Berkeley
Related news release: Stem cell researchers give old muscle new pep